1. What is WPF?
WPF is the latest presentation API
by Microsoft Windows. It is 2D and 3D graphic engine. Its capabilities
include:-
·
All the
common user controls. For example, check boxes, buttons, sliders etc.
·
Supports
flow and fix format documents
·
all the
functionality of Flash and HTML
·
Data
binding
·
Multimedia
·
Animation
2. What are the types of documents supported by
WPF?
Two types of the documents supported
by Windows Presentation Foundation (WPF) are the Flow format and fixed Format
document. Flow format document alters the content to fit the screen size while
fixed format document present content irrespective of the screen size.
3. Name the namespace required for working with 3D.
The namespace required for working
in 3D is System.Windows.Media.Medi3D.
4. Is it right to say that WPF has replaced
DirectX?
No, WPF can never replace DirectX.
WPF cannot be used to create games with stunning graphics. WPF is meant to be a
replacement for windows form, not DirectX.
5. What are dependency properties?
Properties that belong to a specific
class but can be used for another are called the dependency properties.
6. How can the size of StatusBar be increased
proportionally?
By overruling the ItemsPanel
attribute of StatusBar with a grid. The grid’s columns can be appropriately
configured to get the desired result.
7. What are Freezable objects in WPF?
An object, which has its state
locked down, so that it becomes unchangeable, is known as a freezable object.
Such objects perform better. It is also safer if they are required to be shared
between threads.
8. Why should WPF be preferred over Adobe Flash?
WPF is a more recent technology and
thus has the latest development tools. It supports a broader range of
programming languages and has a robust control reuse.
9. How is Silverlight different from WPF browser
application?
One of the major differences is that
.NET framework is required for running WPF browser applications on the client
machine. But Silverlight runs using only the plug-in. Another point of
difference is that applications made in WPF depend on the OS as .NET Framework
only runs on Windows. On the other hand, the Silverlight plug-in can be
installed on those OSs also, which are not Windows.
10. Name the methods present in the
DependencyObject.
It has three objects, namely:
·
SetValue
·
ClearValue
·
GetValue
11. Write about PRISM.
PRISM is a framework for creating
complex applications for WPF, Silverlight or Windows Phone. PRISM utilizes
MVVM, IC, Command Patterns, DI and Separation of Concerns to get loose
coupling.
12. Is it possible to use Windows Forms in a WPF
application?
Yes, Windows form can be used in
WPF. Windows form can appear as a WPF pop. The controls of this Window form can
be placed besides WPF controls in a WPF page by utilizing the functions of the
WindowsFormsHost control that comes preinstalled.
13. Describe CustomControl briefly.
CustomControl widens the functions
of existing controls. It consists of a default style in Themes/Generic.xaml and
a code file. It is the best way to make a control library and can also be
styled or templated.
14. Name the common assemblies used in WPF?
·
PresentationFoundation
·
WindowsBase
·
PresentaionCore
15. Define Path animations in WPF
Path animation is a type of
animation in which the animated object follows a path set by the Path geometry.
16. Can WPF applications be made without XAML?
Yes WPF applications can be created
without XAML as using XAML in WPF is a matter of choice.
17. What are the types of windows in WPF?
WPF has three types of windows:
·
Normal
Window
·
Page
Window
·
Navigate
Window
18. How can elements in a ListBox be sorted?
Sorting can be done by using a
property of the ItemsCollection object. ItemsCollection contains an attribute,
SortDescriptions, which holds System.ComponentModel.SortDescription instances.
Every SortDescription instance defines how the elements should be sorted and
indicates if the sort is descending or ascending.
For instance, this code sorts
elements of ContentControl on the basis of their word count property:
myItemsControl.Items.SortDescriptions.Add(new
SortDescription(“WordCount”, ListSortDirection.Descending));
19. How is MVVM different from MVC?
MVC stands for Model-View Controller
and.MVVM stands for Model-View ViewModel.
In MVVM, View Model is used instead
of a controller. This View Model is present beneath the UI layer. It reveals
the command objects and data that the view requires. It acts like a container
object from which view gets its actions and data.
20. Explain Routed events in WPF.
An event, which can invoke handlers
on more than one listeners present in an element tree, instead of the single
object which called the event, is known as a Routed event.
21. How is System.Windows.Media.Visual dll utilized
in WPF?
It is used whenever a requirement
for creating custom user interface arises. It is a drawing object, which gives
instructions for making an object. These instructions include opacity etc. of
the drawing. The Visual class also bridges the functionalities of WPF managed
classes and the MilCore.dll.
22. What are the various layout panels in WPF?
They are:
·
Stack
Panel
·
Grid
Panel
·
Canvas
Panel
·
Dock
Panel
·
Wrap
Panel
23. Name the important subsystems in WPF
The major subsystems are:
·
Windows.Controls.Control
·
Windows.DependancyObject
·
Windows.FrameworkElement
·
Windows.Media.Visuals
·
Object
·
Threading.DispatcherObject
·
Windows.UIElements
24. What does BAML mean in WPF?
BAML is the abbreviation for Binary
Application Markup Language. It is nothing but XAML that has been tokenized,
parsed and changed into binary form. BAML is a compressed declarative language,
which gets loaded and parsed quicker than XAML.
25. What is Difference between Page and
Window Controls in WPF?
The basic difference is that Window
Control presides over Windows Application while Page Control presides over the
hosted Browser Applications. Also, Window control may contain Page Control, but
the reverse cannot happen.
Previous Next